Pulley mounting and adjusting device for variable-speed transmissions



July 24; 1951 S. WALLACE PULLEY MOUNTING AND ADJUSTING DEVICE FOR VARIABLE SPEED TRANSMISSIONS Filed July 28, 1947 2 Sheets-Sheet 1 July 24, 1951 s. WALLACE 2,561,546

PULLEY MOUNTING AND ADJUSTING DEVICE FOR VARIABLE SPEED TRANSMISSIONS Filed July 28. 1947 2 Sheets-Sheet 2 Patented July 24, 1951 UN S ESai: PAT E NT OFF I CE 7 PULLEYMOUNTING AND ADJUSTING DE- VICE FOR VARIABLE-SPEED TRANSMIS- SIONS" StanleyWallace, Des Plaines, Ill. Application July28, 1947, Serial No. 764,196

18-.Claimst (Cl. 74230.17)

This" invention is concerned fwithzra device for.

mounting expansible'i pulleys and for adjusting the position ithereofwrrelative to. the:,. driving= and. I

driven :pulleysr of a variable" speed transmission.

- Amobjectof the inventioniis'to'produce a novel. universalmounting device iorfexpansible pulleys, wherebysuch? pulleys maybe: secured in position foncoaction yviththeir-driving and driven pulleys; either r'on a suita'blezstructural member I forming azl'surface'which'extendsrirra plane perpendicular" to othe axis 'of the rpulley: shaft :or' on" a' suitablestructura-l member forming asurfacer-which ex tends in parallel withcthe axis .of thepulley shaft.

AilOtIIGI'lObjECViS130"131'0Vid652j' novel-device for adjustingandsecuring the adjusted angular p sition'iof i the pulley holderron its mounting: for

the.-:purpose of varying the: speedwratio between tliecdriving and driven pulleys: as desired,

The :variousobj cots-and features of" the :inven tfon'; including thetobjectsinoted'above; willtbe broughtout =in" thecourse ofqthe detailed descriptionrof anembodimentxof the invention which: is.

presented: below." with reference .to-* the accompanying drawings. In these drawings,

Figwl is alsidenviewtof the new mounting device; with; someparts in section, to illustrate detailsy Figr2shows, on a somewhat-reduced scale, the

Theztnewmounting device: ;-comprises a. frame having a front wall ll forming the face-thereef and; rearwardly extending: flangelikew sidewalls lie-l '3isconnecting {Withrfin fiangelike bottom. wall I I. Partof the: frontvwall isncutzout, leaving an opening: as:showns-particularly in Figs: 5 and 7; forarthe purposerofrireducing the weight or. the mounting: Thez'openingxformsz'inwvardlynextendinggpads a l 5-! finconstituting' mounting-:wmemberss aml'fiatsimilarly:rinwardlyrextendingepad:aprojecta 55 1 dextnotches indicated by numeral 21;

ingirom.thebottom wall l4.. The upper edge 20 of..-the frontwallis arcuatelyshaped, as particu larly seen in Figs. 2, 3, 5 andfl, forming an index. member which is provided with a number of in These notches serve the purpose of locking a springbiased index finger 22. in angularly adjusted .po sition. p

Pivotally secured to the face of the device by means of a journal bolt23, which. is held by a nut Z4, isthe pulley holder or.arm 25. This holder carries the pulleyshaft'which is secured thereto by means of the nut 2.6..(see Figs. 5.and 7) Three pulley disks 2'1, 28, 29(are rotatably mounted .on thevpulley shaft. The pulleywdisks 2'! and. 29 are rotatable on the shaft in common, and .the center pulley disk 28 is independently rotatable and is also axially movable relativeto theinner faces of the pulley disks 21 and 29. Numeral 39 indicatesa grease fitting.,for lubricating thepulleys. The disks forman expansible pulley which,.. assuch, is Well known and .widely. used for vary ing the speed ratio betweendriving pulleys and. driven pulleys. For examplela V-beltmay be disposed. between the pulley disks..2'l2lB cone nectingwitha driving pulley, andsanother V b'elt maybe u disposedbetween the pulley disks 28?29,l connectingwith. a..driven. pulley. If the axialpositionof the expansible pulleys is changed. on.v the pulleyshaftwithrespect. to theaxes of theddriving. and driven. pulleys,.- the .speed ratios. will be changed accordingly. It;is understood, or. course, thatdifferent types of pulleys may. be secured to the holder. I p

The .free end'of the'pulley-holder 25is provided: Withan enlargements laterally rearwardly. ex.- tending; therefromrsand overlapping the arcuates indexmemberZlL A recessedboring is formed intthe enlargement, as particularly shown in Fig. 1; in which is disposed" the plungerlike index finger 22: The shankfil-of-the index r-finger ex.-.-- tends outwardly from thefree-end of the enlarger ment 31.9

An -actuating -member 35wis-pivotally secureditow theouter end ofthe shanktl of the indexfingew byr'means of a: pin: Ell-which? engages the. .legs" 33-"34'form'edby-aslot inrtheinn'erend of the acl tuating memberfi35." A spring 36 is disposed between thehead of the index finger 22' andthe r bottom of the recessed opening in the free end' of theenlargement 37. Accordingly, the pressure of :the spring tends to 'bias 1 the index: finger 22".- inwardly toward zthe notched rarcuate index? meme-L heme;- thusholding: the inner end thereof infene. gagement with? one or the 'depressionss'or notclnis:1

in normal position with its inner end in 'camming" engagement with the enlargement 31. It may be tilted on the enlargement responsive to lateral pressure applied to the knob 38, with its edge, forming a sliding pivot on the surface of the enlargement, to lift the index finger 22, but is held against angular outward displacement by the ledge 39.

The device may be mounted in any one of numerous positions, for example, in vertical position as shown in Fig. 1, on a surface 43 which may be the top surface of a work bench or the The adjusting device, including the actuating member 35, operates as follows:

- When it is desired to move the pulley holder 7 25 in the direction of the arrow shown in Fig. 2, lateral pressure in corresponding direction is applied to the knob 38, to displace the actuating member 35 angularly from its normal position, as shown, for example, in Fig. 5, to its operated position shown in Fig. 2. The member is tilted against the pull of the spring 36, the left edge of its inner end serving as a pivot against the coacting surface of the enlargement ,3], lifting the index finger 22 outwardly, out of engagement with the particular notch 2! in which it, may have been previously placed. In other words, the adjusting member 35 tilts in counter-clockwise direction on its edge 40, as shown in Fig. 2, lifting the index finger 22 from engagement with the locking notch. Further lateral pressure applied to the knob 38 in the direction of the arrow shown in Fig. 2 displaces the holder 25, and therewith the pulleys carried thereby, to a desired angular position in which the desired speed ratio is obained. The actuating member 35 is then released and tilts back into its normal position, as. shown in Fig. 5, thereby releasing the index finger 22 into locking engagement with a corresponding notch 2!.

When it is desired to obtain a speed adjustment requiring angular displacement of the holder 25 in contrary direction, that is to say, in the direction of the arrow shown in Fig.3, lateral pressure is applied to the knob 38 in cor.- responding direction to tilt the actuating member 35 with its edge 4| as pivot point, thereby again lifting the index finger 22 out of locking engagement with a particular index notch. Fur-- ther lateral pressure put on the knob 38 results in angular shifting of the holder 25, and therewith the expansible pulleys, to the desired posb tion." T The knob 38 is then released, releasingthe actuating member 35 to normal, thus causing the index finger 22 to snap into one of the index notches 2| which corresponds to the angular position to which the holder 25 has been advanced. v

When the device is mounted on a surface 43 which extends below and in parallel with the axis of the expansible pulleys, as shown in Fig. 1,

screws or bolts are used which extend through suitable holes 63 in pads formed by the bottom,

flange or wall M, as indicated in Figs. and '7.

It may be desirable to mount the device on a suitable structural member forming the surface 45, shown in Fig. 4, which extends perpendicular to the axis of the pulley shaft. The structural member may be a wall or the leg of a bench or the like. The device is in such case secured by means of screws 46, one on each side of the front wall, the screws extending through holes 62 in the pads l5 and I6 projecting inwardly from the side walls of the frame.

It may also be desirable to mount the device with the outer surface of the side wall or flange 12 in engagement with a structural member forming the surface 41, as shown in Fig. 5. Such mounting is accomplished by means of screws or 'bolts 48 which extend through holes 60 in the mounting pads formed by the flangelike side member, in the extreme adjusted position shown in Fig. 5, clears the mounting surface 41;

In case it is desired to mount the device with" the outer surface of the side wall l3 in engagement with a mounting surface 50, as shown in Fig. 7, this may be done by the use of boltsor'" screws 5l52 extending through'holes 6| provided in the mounting pads formed in the flange-i like side wall. Prior to mounting. thedevice in this particular position it will, however, be neces-" sary to change the position of the actuating member 35 on the pulley holder 25. The actuating member is first removed from its position 'shown in Fig. 5 by releasing the'pin 32, and is turned around by and re-mounted to as'-': sume the position shown in Fig. '7. The knob- 38 is likewise removed and re-mounted to project 1 from the other side of the'actuating member. When the position of the actuating member and the knob is thus changed, they will clear the" mounting surface 50 in the extreme angularly adjusted position of the pulley holder, as shown" in Fig. '7. p #1 The device may also be mounted on top of a work' bench or the like, forming the surface f 54, as shown in Fig. 6. Such mounting is accom plished by screws or bolts 53 extending through the holes 62 in the pads l5 and IE on the face of the frame.

The device may be similarly mounted in'fin verted position, depending from a structural member 55 which may be a bench or the like.- The mounting is secured by means of bolts or screws such'as 51 shown in Fig. 8. If the structural member 55 terminates at the left, as in dicated by the edge 58, no further adjustmentwill be required. If the member 55, however, extends further to the left, it will be necessary to change the position of the knob 38 to depend from the actuating member 35 downwardly'in stead of pointing upwardly as shown.

A particular arcuate index member index depressions or notches 2! has been shown only for the sake of convenience. Holes "01Slllti able other depressions may be substituted for the notches. I 2 x1 4,

The index member may also have a'laterallyor angularly extending arcuate surface for frictional engagement with a coacting surface of a: suitably modified index finger. as shown in Fig. 9, a V-notch 20' may be provided 20 having;

For example:-

member 20b; mayirormaarriarcuate iridgetwhichr :imexstruoture andrecombination:.deiihedijiim may be V-shapedlingcross-isectiomfor frictionalzi claim 2;:together;withganienlargementicarriedxbyw engagement' withtan index. imembernfiboformi-ng saidipulley holderasubstantially at itherfree ends a correspondingly: shapedrcutou-t or -s depression; thereof; said enlargement forming rythe cavity fore Modificationsiprovidingwfor frictionalsengagementr 5?. receiving saidiindexwfingerrandalso, formingrthee of th'e index finger :with-the iarcuatei indexsm'eme l coacting surface; for i engagement by the teamber will provideifori angular-adjustment ofxztheii mingusurface of said adjusting member; pulley holder in infinite: incrementsziot (angular 6: The :istructure and'icombinationar. defined-line;

displacement. claim,2 together. with a lateral enlargementicarat Changes may be: made within the: sccpei-andii 0 .ried by said pulley holder near.thefreeendthereepirit r thgiappended lai of; said enlargement zforming the -ca'-vity= for re- I-;: 1 ,im ceiving; said index; finger: and? also" forming? the 1;: Al devi for adjus'bingiltheleangulan positions coactingi: surface; for r engagement by r the 1 calm i of a pivotallyimounted:'pulleywholdery saider deazi ming surface of saidsiadjustingi.memb'en-the frees vicgecomprising ,1. f f 'n i anoarcuately 15.;end of saidholderaformingta backing -for one side shaped index member carrying aa plurality of '1? of :ISaid adjusting membertto: prevent angular dis..- angularly spaced indexi depressions; meanswforv, placement thereof radiallyiiof said indexiflnger: pivotally mounting. said holder -:on said 'frame;- at iAupulley un n idev C p airtime-rt movable index finger carriedby said holderiwithm forming aaafacewpl te; a pulley holder: carryinggan ima' cavityformeditherebyg an adjustingememberi h ft p votally mounted on said face plate; means-:- forming a camming surface; i rneans fdr pivotallyr one said I mounting i formingv oppositelyfi disposedr'i coupling said adjusting member directly lwithtthemoun ing members forselectivelyr securing said Oil-'68P" endi of said i index finger so that -it is-r frame unsuitable structural elements forming: angularly movable -with respectto andawayfrom Surfaces'eXtending in: pl nes whieht par -ll'eli b e the axistthereof; andispringameanssfdr im in axis of; said'shaft,and*an.adjusting-x member ass saidindex'finger normally axiallyinwardlyythere sooiated with said pulley holder for lockingench"; b ih i ,lthe v a i i ia ju t holder. in: adjusted angular positionnsaid; ads member in'normal position-fin engagement with-a iu ns m mber. inapiv ally i mounte ion thecoacting surface formed by-said holder and causpu ley. ho e d e fl o therefr m ate inglfithel i i saidijndexl'fingeroto; engage 39s: angle (to .themedian centertline thereof :to clear oneofrsaid index: i depressions l corresponding to thevsurface. of, the structural element on which-w th angularupositionz iof s i 1 hold 'n said mounting is. secured iwhentthe pulley. holder,

ZtLAtdeVice 'fOrl adjusting theangulanposition sin extreme operat ve imitposition with,itsifreeii of iawpivotally mounted pulley holder; said device n st ntially, adja enttthe ,surface Ofq suchi comprising a-wframewforming an arcuately-lshaped finstnuc 'flle eme t a v index member carrying ca. plurality sof" angularly The r c n combination defined in spaced-r indexiv: depressions, means-1 for pivotally fl, 1 e her withnmeanswoni said, framefor, mounting::said holder on said frame; a" movable: t -se urin the mounting, on; aisuit-e index finger carriedbysaidholdenwithinia-cayity b Structural m ntf rming a surfaceextend: formed thereby;the endsiofrsaid indexafingerpro- 40i-i Liatauang1e to the, p1 nesiofjsaidlfirstinotedv jecting 'froma said cavitypanw adjustingr membertelydisposed mounting members. formingacamming-surface;meansfor'pivotally- The t t and b n fi' ed'iini coupling Said, adjusting; member t claim 'l; togetherwith-means on saidqframefo'rmthe outer end of said index finger whicmprojects ingermolmtingdor "alt rnatively? secu ing the: from said@cayity; andi'sprjng means within Said i frameon--=a-=suitable'structural!elementforming; cavity for biasing said index finger normally Surfeoe-extending-in" a i os d D61? axially inwardly; thereby holding: the camming 13811011611131 "to th l di r -no xom surface, OLSaid=adjll ting memher l d with positely disposedmounting members.- the index finger normally in engagementrwithai loi'iIncombinationv n' memberforming coacting surface formed by sai d h ld and onusmoan-a arcuately shaped indexsurface; a- -pivotallw ing t inner'en-d-of aid index finger to engage mountedssholderya :devicefo'r angularly displac on fl jd index depressions correspondingj toy ingiicsaidzh'older" relative tosaidindex; surface, hfiianglilaliip'positionwof.said :h-older; saiddadj-ust s i vi compri i g n nl re m nt pr jecn ingtmemberrbeing.operativeares onsive toilateral ne r m Said holder 1n re w r v rl pp n pressureaappliedthereto.towtiltiwithi its camming D relative to -saidiindexrsulfae'er a surfaeeeonzsaid coactingisurface; therebyewith enlargement:zformingca cavity disposed in parallel rawingtzthcrinneruendwof.isaidriindex fingers-fromwith: the umedian ice'nter line of said-holder and engagement with said ind x depression d th r also forming a shelfiike surface which is disposed after moving said pulley holder into desired anin a plane ext n p rp r t aid median gular position in which said lateral pressure is center line, an index finger disposed in said cavity, relaxed to allow return of said adjusting member the inner end of said index finger projecting from to normal position and engagement of the inner said cavity toward said index surface and the 7 end of said index finger with another one of said outer end thereof projecting therefrom and in depressions c r p n ing to the adju beyond said shelfiike surface, an actuating memangular p on of Said holde ber forming a slot for directly receiving the outer The Structure and combination defined in end of said index finger, means for directly pivclaim wherein Said adjusting member 5 I101 otally coupling the outer end of said index finger m l y p ed at n an le t h median Center with said actuating member, and spring means line extending through said pulley holder. disposed in said cavity for axially inwardly bias- 4. The structure and combination defined in ing said index finger to hold the inner end thereclaim 2, wherein an enlargement is formed on of in looking engagement with said index surface said pulley holder forming said cavity for said and to maintain the inner end of said actuating index fingers and also forming said coacting member normally in engagement with said shelfsurface for engagement by the camming surface like surface. of said adjusting member. 11. The structure and combination defined in claim 10,:together with an extensionprojecting from said holderand overlapping the inner end of said actuating member on one side thereof to 7 hold the actuating member against angular displacement radially of said index finger.

I 12..[he structure and combination definedin claim 10, wherein said index surface is aridge projecting from said index member, and wherein said index finger forms a cutout for frictional engagement with said ridge.

--13. The structure and combinationdefined in claim 10, wherein said index surface is a groove formed in said index member for frictional en-'- gagement by said index finger.

14. In combination, means forming an arcuately shaped'index member carrying a plurality of angularly spaced index depressions, a pivotally mounted holder, a device for angularly displacing said holder relative to said index member, said device comprising an enlargement projecting from said holder in overlapping relationship relative to said index member,- said enlargement forming a generally cylindrical cavity disposed in parallel with the median center lineof said holder and also forming a 'shelflikesurface which" is disposed in a plane extending perpendicular to said median center line, a plungerlike index finger disposed directly in said cavity, the inner end of said index finger projecting from said cavityftowa'rdsaid index member and the outer end thereof projecting therefrom and extending beyond'the plane of said shelflike surface, an actuating member forming a slot for directly receiving the outer end of said index finger which projects beyond said shelfiike surfacemeans for pivotally coupling the outer end of said, index finger directly with saidactuating member, spring means disposed in said-cavity for axially inwardly biasing said index finger to hold the inner end thereof in looking engagement with one of said index depressions and to maintain the inner end of said actuating member normally in engagement with said shelflike surface, an extension project- I ing from said holder and, overlapping the inner.

endlof said actuating memberon one side thereof tohold such member against angular displacement radially of said index finger, said actuat- 'ing memberbeing operative responsive to lateral pressure applied thereto to tilt on said shelfiike surface with oneedge of its inner end acting as a sliding pivot thereon, thereby lifting said index finger relative to said index member for thepurpose of/allowing angular displacement of said adjusting element. I

"15. The structure and combination defined in claim 14, wherein said actuating member is dis- 8 Z posed on said adjusting element at a'riangle to the median center line thereof.

16'."A pulley mounting of the class described comprising a frame forming a face plate, a holder pivotally secured to said face plate-apulley shaft extending from said holder, and mounting means a formed by said frame for selectively securing the mounting in planes extending perpendicular. to the axis of said pulley shaft or alternatively in planes extendinginparallel with the axis of said pulley shaft, said mounting means comprising side walls rearwardly extending from said face plate, said side walls forming pads disposed in parallel with said face plate.

:17. A pulley mounting of the class described comprising a frame forming a face plate, a holder 1 pivotally secured to said face plate, a'pulley shaft extending from said holder, means formed bysaid frame and disposed in parallel with said face plate butspaced therefrom for securing the mounting onv a support forming a surface which is disposed in a plane extending in parallel with the plane of said face plate,'and' means extending rearwardly perpendicularly, fromsaid face; plate for securing 'saidmounting selectively in any one of three alternate positions on corresponding supports each forming a surface-which extends in aplane disposed in parallel with the axis of said pulley shaft.

l8. A pulley mounting of theclass described comprising a generally rectangular frame forming a face plate, a holder pivotally secured to said face plate, a pulley shaft extendingv from said holder, fiangelike side and bottom walls extend-- ingperpendicularly rearwardly from said face plate, each of said Walls forming mounting means for securing themounting on a support forming a surface which isdisposed in 'a plane extending in parallel With the axis of said pulley shaft, and means'carried by some of said'side Walls form-; ing padding for" securing said mounting on a' support forming a surface which is disposed in a" plane extending perpendicularto the axis of said pulley shaft. i i

P s'rANLEx LLACE,

REFERENCES CITED The followingreferences are of record in the file of this patent:

SllSka Aprf30, 1946 

